Green’s Dictionary of Slang

a male comment on a woman who, supposedly if not actually, is inflamed with lust.

1958		R. Frede Entry E (1961) 39: Christ, look at the can on that girl [...] That’s just begging ...
1989		(con. 1960) P. Theroux My Secret Hist. (1990) 175: I got a broad in Orient Heights begging me for it.